CN114458608A

CN114458608A - Pipeline shielding electric pump with outstanding cooling effect

Info

Publication number: CN114458608A
Application number: CN202210124300.5A
Authority: CN
Inventors: 刘艳
Original assignee: Richter Zhejiang Technology Co ltd
Current assignee: Richter Zhejiang Technology Co ltd
Priority date: 2022-02-10
Filing date: 2022-02-10
Publication date: 2022-05-10
Anticipated expiration: 2042-02-10
Also published as: CN114458608B

Abstract

The invention relates to the field of electric pumps, in particular to a pipeline shielding electric pump with outstanding cooling effect, which comprises a driving motor, a pump body and a base, wherein the pump body is provided with a liquid inlet and a liquid outlet, the top end of the liquid outlet is provided with a circulating hole close to the right side, one end of a liquid guiding pipe is fixedly communicated in the circulating hole, the other end of the liquid guiding pipe is communicated with the inner cavity of the driving motor, a filter plate is fixedly connected on the inner wall of the liquid outlet and is arranged at the left side of the circulating hole, an impact mechanism is arranged between the circulating hole and the filter plate, a collecting mechanism is arranged below the left side of the filter plate, and the liquid entering the motor does not contain impurities by filtering the liquid before entering the motor, so that the liquid does not damage the motor, the motor is well protected, the service life of the pipeline shielding electric pump is greatly prolonged, and meanwhile, the impurities accumulated on the filter plate can be collided by the impact mechanism, the filter plate is collected through the collecting mechanism, so that the filter plate cannot be blocked in the using process.

Description

Pipeline shielding electric pump with outstanding cooling effect

Technical Field

The invention relates to the field of electric pumps, in particular to a pipeline shielding electric pump with a prominent cooling effect.

Background

The pipeline shielding electric pump introduces a part of liquid in a liquid outlet into the motor through the liquid guide pipe and finally returns to the impeller chamber, on one hand, relevant parts (such as a sliding bearing consisting of a shaft sleeve, a thrust bearing and a graphite bearing) in the motor are lubricated through continuous circulation, so that the noise in the operation process of the motor is greatly reduced, on the other hand, when the liquid passes through the inside of the motor, the heat in the operation process of the motor can be taken away, a good heat dissipation effect is achieved, the conveyed liquid needs to enter the inside of the motor, if impurities are mixed in the conveyed liquid, the impurities can be adhered to the inside of the motor, a circulating channel can be blocked up over time, the circulation is not facilitated, meanwhile, the normal operation of the motor is influenced, the motor cannot be operated, the motor is damaged, and the service life of the motor is greatly reduced, however, in the prior art, there is no device for filtering the liquid introduced into the motor and removing the filtered impurities, so that the problems in the prior art can easily occur when the pipeline canned motor pump is used, the effective circulation of the liquid can not be established for a long time, the motor of the pipeline canned motor pump can not normally operate regularly, and the service life of the motor is short.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention aims to provide the pipeline shielding electric pump with the outstanding cooling effect, which solves the problems in the prior art, and the liquid which is conveyed does not contain impurities and cannot damage the motor by filtering the liquid before entering the motor, so that the service life of the pipeline shielding electric pump is greatly prolonged, and meanwhile, the impurities accumulated on the filter plate can be knocked down by the knocking mechanism and collected by the collecting mechanism, so that the filter plate cannot be blocked in the using process.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a pipeline canned motor pump that cooling effect is outstanding, including driving motor, the pump body and base, be equipped with inlet and liquid outlet on the pump body, the top of liquid outlet is close to the right side and has seted up the circulation hole, the one end that the downthehole fixed intercommunication of circulation has the stalk, the inner chamber of the other end intercommunication driving motor of stalk, fixedly connected with filter on the inner wall of liquid outlet, the filter setting is in the left side in circulation hole, be provided with striking mechanism between circulation hole and the filter, the left side below of filter is provided with the collection mechanism.

Preferably, the impact mechanism comprises a driving machine fixed on the outer side wall of the top of the liquid outlet, the driving machine is fixedly connected with a swing rod, and an impact ball is fixed at the bottom end of the swing rod.

Preferably, the collection mechanism is including setting up at the liquid outlet below first arc protruding left and second arc protruding right, the bottom of first arc and the bottom of second arc are fixed respectively on the top surface of collecting box, the top of first arc pierces through the inner chamber that the liquid outlet stretched into the liquid outlet, the top of second arc is fixed in the lateral wall of the liquid outlet on filter right side, the intercommunication groove has been seted up on the collecting box, the intercommunication groove sets up between first arc and second arc, but be equipped with open closed door on the collecting box.

Preferably, the bottom of first arc is fixed with the first hang plate of directional right-hand slope, and the bottom of second arc is fixed with the second hang plate of directional left-hand slope, and first hang plate and second hang plate are the symmetry setting, and the bottom between them leaves the clearance.

Preferably, a guide plate which inclines downwards to the right is fixed at the top end of the first arc-shaped plate.

Preferably, a plurality of arc-shaped baffle plates protruding upwards are uniformly distributed on the inner side surface of the first arc-shaped plate.

Preferably, a micro cooling box is fixed on the liquid guiding pipe, cooling liquid is placed in the micro cooling box, a cooling pipe is arranged in the cooling liquid, the cooling pipe is arranged in a winding shape, and two ends of the cooling pipe are respectively communicated with the liquid guiding pipe.

Preferably, the impact mechanisms are provided in two numbers, and the two numbers are respectively fixed on the top outer side wall and the bottom outer side wall of the liquid outlet.

Preferably, the base passes through the bolted connection pump body, the pump body includes inlet and liquid outlet and with the communicating impeller chamber of inlet and liquid outlet, the impeller that has by motor drive in the impeller chamber, the motor includes stator and rotor, the cover has the stator shield cover on the stator, the cover has the rotor shield cover on the rotor, have the space between stator shield cover and the rotor shield cover, the both ends of rotor are equipped with thrust bearing and lower thrust bearing, the outside of going up thrust bearing is provided with graphite bearing, graphite bearing down is provided with down in the outside of thrust bearing, the outside of going up graphite bearing is provided with bolster, graphite bearing's the outside is provided with the step down.

(III) advantageous effects

The invention provides a pipeline shielding electric pump with outstanding cooling effect, which filters the conveyed liquid before entering the motor, so that the liquid entering the motor does not contain impurities and cannot damage the motor, the motor is well protected, the service life of the pipeline shielding electric pump is greatly prolonged, meanwhile, the impurities accumulated on the filter plate can be knocked down by the knocking mechanism, and the filter plate can not be blocked in the using process by the collection mechanism for collection.

Drawings

Fig. 1 is an overall schematic view of the present invention, wherein the right side of the central axis is a sectional view.

Fig. 2 is an overall schematic view of the present invention.

Fig. 3 is a partial enlarged view of a in fig. 2 according to the present invention.

Fig. 4 is an overall schematic view of the present invention.

In the figure: 1-driving motor, 2-pump body, 3-base, 4-liquid inlet, 5-liquid outlet, 6-circulation hole, 7-liquid guiding pipe, 8-filter plate, 9-impact mechanism, 10-collecting mechanism, 11-driving machine, 12-swing rod, 13-impact ball, 14-first arc plate, 15-first arc plate, 16-collecting box, 17-communicating groove, 18-first inclined plate, 19-second inclined plate, 20-guide plate, 21-arc baffle, 22-micro cooling box, 23-cooling pipe, 24-impeller chamber, 25-impeller, 26-stator, 27-rotor, 28-stator shielding sleeve, 29-rotor shielding sleeve, 30-upper thrust bearing, 31-lower thrust bearing, 32-upper bearing seat, 33-lower bearing seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 4 in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a technical scheme that: a pipeline shielding electric pump with outstanding cooling effect comprises a driving motor 1, a pump body 2 and a base 3, wherein a liquid inlet 4 and a liquid outlet 5 are arranged on the pump body 2, a circulation hole 6 is formed in the top end of the liquid outlet 5, which is close to the right side, one end of a liquid guide pipe 7 is fixedly communicated in the circulation hole 6, the other end of the liquid guide pipe 7 is communicated with the inner cavity of the driving motor 1, a filter plate 8 is fixedly connected on the inner wall of the liquid outlet 5, the filter plate 8 is arranged on the left side of the circulation hole 6, an impact mechanism 9 is arranged between the circulation hole 6 and the filter plate 8, a collecting mechanism 10 is arranged below the left side of the filter plate 9, when the pipeline shielding electric pump works, the motor 1 is started, liquid to be conveyed is sucked into the liquid inlet 4 from the outside and then is conveyed to the liquid outlet 5, most of the liquid in the liquid conveying opening 5 is conveyed to an appointed place, and a small part of the liquid is guided to the inner cavity of the motor 1 through the liquid guide pipe 7, before the liquid enters the motor, the liquid is filtered by the filter plate 8, the impurities mixed in the liquid are filtered, meanwhile, the impact mechanism 9 carries out regular impact on the filter plate 8, the impurities adhered on the filter plate 8 are impacted and fall off, the impacted impurities just fall into the collecting mechanism 10 below the left side of the filter plate 8 and are collected by the collecting mechanism 10, on one hand, the liquid is well filtered, so that the liquid entering the motor does not contain impurities and cannot damage the motor, the motor is well protected, the service life of the pipeline shielding electric pump is greatly prolonged, on the other hand, the impurities adhered to the filter plate 8 are well collected, meanwhile, the cleaning work of the filter plate 8 is omitted, so that a lot of troubles are reduced, and the situation that the liquid cannot be transmitted due to the blocking of the filter holes in the filter plate 8 is avoided.

Striking mechanism 9 is including fixing driving machine 11 on the top lateral wall of liquid outlet 5, and driving machine 11 fixedly connected with rocking bar 12, and the bottom mounting of rocking bar 12 has impact ball 13, and this kind of striking mode is fairly simple relatively, and the effect of striking is good simultaneously, and the impurity of adhesion drops easily after receiving the impact on the filter 8, the condition that the filtration pore was stopped up can not appear.

Collecting mechanism 10 is including setting up at the liquid outlet 5 below first arc 14 protruding left and second arc 15 protruding right, the bottom of first arc 14 and the bottom of second arc 15 are fixed respectively on the top surface of collecting box 16, the top of first arc 14 pierces through the inner chamber that liquid outlet 5 stretched into liquid outlet 5, the top of second arc 15 is fixed in the lateral wall of liquid outlet 5 on filter 8 right side, intercommunication groove 17 has been seted up on collecting box 16, intercommunication groove 17 sets up between first arc 14 and second arc 15, be equipped with openable door on collecting box 16, fix the top of second arc 15 in the lateral wall of liquid outlet 5 on filter 8 right side, can let the impurity that shakes down on filter 8 fall into the cavity that first arc 14 and second arc 15 enclose, avoided the top of second arc 15 to fix on filter 8 left side and some impurity that cause directly can't be received on the inside wall of liquid outlet 5 and drop The condition of collection appears, set first arc 14 to stretch into the inner chamber of liquid outlet 5, the inner wall at its top and liquid outlet 5 top leaves the passageway, through this setting, the part of first arc 14 in liquid outlet 5 inner chamber has reduced the passageway that liquid passes through on the one hand, and then make the pressure of liquid through filter 8 increase, thus make the speed that liquid passes through filter 8 improved, on the other hand, when striking mechanism 9 strikes filter 8, impurity on filter 8 receives the power of striking leftwards on the one hand, on the other hand receives the impact force of liquid rightwards, so impurity still receives certain resistance in the process that will drop by the striking, it down falls too easily, first arc 14 in liquid outlet 5 inner chamber has played the effect of fine barrier liquid impact force, make impurity on filter 8 drop down more easily, simultaneously, after the liquid thrown out from the pump cavity of the pump body 2 passes through the gap between the first arc-shaped plate 14 and the inner wall of the top of the liquid outlet 5, the liquid can fall downwards due to no blocking of the first arc-shaped plate 14, the liquid flowing downwards can drive the shaken impurities to move downwards, the liquid enters the collecting box 16 through the communicating groove 17 to be collected, the impurities cannot be rotated in the liquid without direction, the situation that the impurities cannot enter the collecting box 16 occurs, the door arranged on the collecting box 16 can be opened when the impurities in the collecting box are full, the impurities are taken out, and the door is very convenient to close again after the impurities are removed.

The bottom of first arc 14 is fixed with the first hang plate 18 of directional right-hand dip, the bottom of second arc 15 is fixed with the second hang plate 19 of directional left-hand dip, first hang plate 18 and second hang plate 19 are the symmetry and set up, and the bottom between them leaves the clearance, through setting up first hang plate 18 and second hang plate 19, impurity gets into collecting box 16 through the clearance between first hang plate 18 and the second hang plate 19, compare in intercommunication groove 17, obviously make the passageway that impurity got into in collecting box 16 diminish, this passageway impurity can pass through, but the impurity that gets into in collecting box 16 is difficult to return out from this clearance, play fine collecting action.

The top of first arc 14 is fixed with the guide plate 20 that inclines downwards to the right, when the liquid that throws away from the pump chamber of the pump body 2 passes through the space between the top of first arc 14 and the top inner wall of liquid outlet 5 like this, the liquid part that the velocity of flow is very fast is carried out the water conservancy diversion by guide plate 20 below to the right, can accelerate the speed that is close to filter 8 left side liquid downward flow like this, thereby can make the impurity that is shaken down on the filter 8 along with the downward flow of liquid and downstream, the speed in impurity entering collecting box 16 has been accelerated.

The inner side surface of the first arc-shaped plate 14 is uniformly distributed with a plurality of arc-shaped baffle plates 21 which are convex upwards, the arc-shaped baffle plates 21 have elasticity and further play a role in guiding flow, the arc-shaped baffle plate 21 at the bottommost end can just cover the gap between the bottom ends of the first inclined plate 18 and the second inclined plate 19 under the action of no external force, when the arc-shaped baffle plate 21 is impacted by downward liquid flow, the arc-shaped baffle plate 21 deviates leftwards and downwards to expose the gap between the bottom ends of the first inclined plate 18 and the second inclined plate 19, so that impurities can conveniently enter the collecting box 16, in some cases, when a little impurities in the collecting box 16 flows back upwards from the gap between the bottom ends of the first inclined plate 18 and the second inclined plate 19, the moving direction of the liquid flow is bound to be upward, at this time, the arc-shaped baffle plates 21 deviates rightwards and upwards to prevent the impurities from further moving upwards and mixing into the liquid again, playing a good role in blocking.

Be fixed with miniature cooling box 22 on the liquid guide pipe 7, the coolant liquid has been placed in miniature cooling box 22, be provided with cooling tube 23 in the coolant liquid, cooling tube 23 sets up to the tortuous form of bending, and its both ends are linked together with liquid guide pipe 7 respectively, through setting up miniature cooling box 22, carry out refrigerated effect earlier with the inside liquid that gets into the motor, when liquid gets into motor 1 inside like this, play fine cooling radiating effect to motor 1, increased the life of motor.

Striking mechanism 9 is provided with two, and it is fixed respectively on the top lateral wall of liquid outlet 5 and on the bottom lateral wall, through two striking mechanisms 9 about setting up for the dynamics of striking is bigger, and the scope of striking is wider more even, thereby makes the effect of striking better, is hit by the impurity of adhesion more easily on the filter 8 and falls.

The base 3 passes through the bolted connection pump body 2, the pump body 2 includes inlet 4 and liquid outlet 5 and communicates with each other impeller chamber 24 with inlet 4 and liquid outlet 5, impeller 25 by motor 1 driven has in the impeller chamber 24, motor 1 includes stator 26 and rotor 27, the cover has stator shield 28 on the stator 26, the cover has rotor shield 29 on the rotor 27, have the space between stator shield 28 and the rotor shield 29, the both ends of rotor 27 are equipped with thrust bearing 30 and lower thrust bearing 31, the outside of going up thrust bearing 30 is provided with graphite bearing, graphite bearing is provided with down in the outside of lower thrust bearing 31, the outside of going up graphite bearing is provided with bolster 32, the outside of graphite bearing is provided with step 33 down.

The working principle is as follows: when the filter plate works, the motor 1 and the impact mechanism 9 are started simultaneously, the conveyed liquid is input from the pump body liquid inlet 4 and enters the impeller chamber 24, the impeller 25 is driven to rotate by the rotation of the motor 1 to generate a certain negative pressure, the liquid reaches the liquid outlet 5 of the pump body 2 from the outlet of the impeller 25 through the volute flow channel of the pump body 2, the liquid in the liquid outlet 5 firstly passes through the gap between the top of the first arc-shaped plate 14 and the inner wall of the top of the liquid outlet 5, the part of the first arc-shaped plate 14 in the inner cavity of the liquid outlet 5 reduces the passage through which the liquid passes on the one hand, and further increases the pressure of the liquid passing through the filter plate 8, so that the speed of the liquid passing through the filter plate 8 is improved, on the other hand, when the impact mechanism 9 impacts the filter plate 8, impurities on the filter plate 8 are impacted leftwards, and on the other hand are impacted by the right impact force of the liquid, therefore, the impurities are still subjected to certain resistance in the process of falling when being impacted and are not easy to fall down, the first arc-shaped plate 14 in the inner cavity of the liquid outlet 5 plays a good role in blocking liquid impact force, so that the impurities on the filter plate 8 are easier to fall down, meanwhile, after the liquid thrown out from the pump cavity of the pump body 2 passes through the gap between the first arc-shaped plate 14 and the inner wall of the top of the liquid outlet 5, the liquid falls downwards due to no blocking of the first arc-shaped plate 14, so that the liquid flowing downwards drives the shaken impurities to move downwards and enter the collecting box 16 through the communicating groove 17 to be collected, the impurities cannot be rotated in the liquid in no direction and cannot enter the collecting box 16, the liquid part with the originally high flow rate is guided to the right lower side by the guide plate 20 due to the arrangement of the guide plate 20, so that the downward flowing speed of the liquid near the left side of the filter plate 8 can be accelerated, therefore, the impurities dropped from the filter plate 8 can move downwards along with the downward flow of the liquid, the speed of the impurities entering the collecting box 16 is increased, the door arranged on the collecting box 16 can be opened when the impurities in the collecting box are full, the impurities can be taken out conveniently, the door is closed again after the impurities are removed, a plurality of arc-shaped baffles 21 protruding upwards are uniformly distributed on the inner side surface of the first arc-shaped plate 14, the arc-shaped baffles 21 have elasticity and further play a role in guiding flow, the arc-shaped baffle 21 at the bottom end can just cover the gap between the bottom ends of the first inclined plate 18 and the second inclined plate 19 under the effect of no external force, when the arc-shaped baffle 21 is impacted by the downward liquid flow, the arc-shaped baffle 21 deviates to the left lower direction, the gap between the bottom ends of the first inclined plate 18 and the second inclined plate 19 is exposed, and the impurities can conveniently enter the collecting box 16, in some cases, when the impurities in the collection box 16 slightly flow back and forth from the gap between the bottom ends of the first inclined plate 18 and the second inclined plate 19, the moving direction of the liquid flow is certainly upward, at this time, the arc-shaped baffle 21 is deflected to the right and upward direction to block the impurities from further moving upward and mixing into the liquid again, so as to play a good role in blocking, after these processes, the liquid passing through the filter plate 8 is free of impurities, and a part of the liquid is diverted from the circulation hole 6 of the pump body 2 to the inner cavity of the upper bearing seat 32 through the liquid guiding pipe 7, and then enters the inner cavity of the stator 26 through the V-shaped groove, the straight groove and the spiral groove on the upper graphite bearing of the immersion liquid in the upper bearing seat 32, and at the same time, the friction among the shaft sleeve, the upper thrust bearing 30 and the upper graphite bearing is fully lubricated in the process, so as to play a good role in noise reduction, the liquid to be conveyed flows onto the lower graphite bearing in the lower bearing seat 33 through the stator 26, the rotor 27, the gap between the stator shielding sleeve 28 and the rotor shielding sleeve 29 after entering the inner cavity of the stator 26, and then enters the impeller chamber 24 through the V-shaped groove, the straight groove and the spiral groove, so that a large circulation loop is formed in the whole process.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a pipeline canned motor pump that cooling effect is outstanding, includes driving motor (1), the pump body (2) and base (3), be equipped with inlet (4) and liquid outlet (5) on the pump body (2), circulation hole (6) have been seted up near the right side on the top of liquid outlet (5), circulation hole (6) internal fixation intercommunication has the one end of drainage pipe (7), the other end intercommunication of drainage pipe (7) the inner chamber of driving motor (1), a serial communication port, fixedly connected with filter (8) on the inner wall of liquid outlet (5), filter (8) set up the left side in circulation hole (6), circulation hole (6) with be provided with striking mechanism (9) between filter (8), the left side below of filter (9) is provided with collects mechanism (10).

2. The electric pipeline shielding pump with the outstanding cooling effect as claimed in claim 1, characterized in that the impact mechanism (9) comprises a driving machine (11) fixed on the top outer side wall of the liquid outlet (5), the driving machine (11) is fixedly connected with a swing rod (12), and the bottom end of the swing rod (12) is fixed with an impact ball (13).

3. The electric pipeline shielding pump with outstanding cooling effect according to claim 1, characterized in that the collecting mechanism (10) comprises a first arc-shaped plate (14) protruding leftwards and a second arc-shaped plate (15) protruding rightwards and arranged below the liquid outlet (5), the bottom of the first arc-shaped plate (14) and the bottom of the second arc-shaped plate (15) are respectively fixed on the top surface of a collecting box (16), the top of the first arc-shaped plate (14) penetrates through the liquid outlet (5) and extends into the inner cavity of the liquid outlet (5), the top of the second arc-shaped plate (15) is fixed in the side wall of the liquid outlet (5) at the right side of the filter plate (8), a communicating groove (17) is arranged on the collecting box (16), and the communicating groove (17) is arranged between the first arc-shaped plate (14) and the second arc-shaped plate (15), the collecting box (16) is provided with a door which can be opened and closed.

4. The electric pipeline shielding pump with the outstanding cooling effect according to claim 3, characterized in that a first inclined plate (18) inclined to the right is fixed to the bottom of the first arc-shaped plate (14), a second inclined plate (19) inclined to the left is fixed to the bottom of the second arc-shaped plate (15), and the first inclined plate (18) and the second inclined plate (19) are symmetrically arranged with a gap left between the bottom ends of the first inclined plate and the second inclined plate.

5. The electric pipeline shielding pump with the outstanding cooling effect as claimed in claim 3, characterized in that a flow guide plate (20) which is inclined downwards to the right is fixed at the top end of the first arc-shaped plate (14).

6. The electric pipeline shielding pump with the outstanding cooling effect as claimed in claim 3, characterized in that a plurality of convex arc-shaped baffles (21) are uniformly distributed on the inner side surface of the first arc-shaped plate (14).

7. The electric pipeline shielding pump with the outstanding cooling effect as claimed in claim 1, wherein a micro cooling box (22) is fixed on the liquid guiding pipe (7), a cooling liquid is placed in the micro cooling box (22), a cooling pipe (23) is arranged in the cooling liquid, the cooling pipe (23) is arranged in a winding shape, and two ends of the cooling pipe are respectively communicated with the liquid guiding pipe (7).

8. The electric pump with outstanding cooling effect for pipeline shielding as claimed in claim 2, wherein the two impacting mechanisms (9) are respectively fixed on the top outer side wall and the bottom outer side wall of the liquid outlet (5).

9. The electric pipeline shielding pump with the outstanding cooling effect as claimed in claim 1, wherein the base (3) is connected with a pump body (2) through bolts, the pump body (2) comprises the liquid inlet (4) and the liquid outlet (5) and an impeller chamber (24) communicated with the liquid inlet (4) and the liquid outlet (5), an impeller (25) driven by the motor (1) is arranged in the impeller chamber (24), the motor (1) comprises a stator (26) and a rotor (27), a stator shielding sleeve (28) is sleeved on the stator (26), a rotor shielding sleeve (29) is sleeved on the rotor (27), a gap is arranged between the stator shielding sleeve (28) and the rotor shielding sleeve (29), an upper thrust bearing (30) and a lower thrust bearing (31) are arranged at two ends of the rotor (27), and an upper graphite bearing is arranged at the outer side of the upper thrust bearing (30), the outer side of the lower thrust bearing (31) is provided with a lower graphite bearing, the outer side of the upper graphite bearing is provided with an upper bearing seat (32), and the outer side of the lower graphite bearing is provided with a lower bearing seat (33).